diff r 972a69e47cd9 r e4f025078c1c src/video/SDL_rect.c
 a/src/video/SDL_rect.c Sun Jan 04 23:36:53 2009 +0000
+++ b/src/video/SDL_rect.c Sun Jan 04 23:41:09 2009 +0000
@@ 184,23 +184,22 @@
return SDL_TRUE;
}
 else
 {
 /* The task of clipping a line with finite slope ratios in a fixed
 * precision coordinate space is not as immediately simple as it is
 * with coordinates of arbitrary precision. If the ratio of slopes
 * between the input line segment and the result line segment is not
 * a whole number, you have in fact *moved* the line segment a bit,
 * and there can be no avoiding it without more precision
 */
 int *x_result_[] = {X1, X2, NULL}, **x_result = x_result_;
 int *y_result_[] = {Y1, Y2, NULL}, **y_result = y_result_;
+ else {
+ /* The task of clipping a line with finite slope ratios in a fixed
+ * precision coordinate space is not as immediately simple as it is
+ * with coordinates of arbitrary precision. If the ratio of slopes
+ * between the input line segment and the result line segment is not
+ * a whole number, you have in fact *moved* the line segment a bit,
+ * and there can be no avoiding it without more precision
+ */
+ int *x_result_[] = { X1, X2, NULL }, **x_result = x_result_;
+ int *y_result_[] = { Y1, Y2, NULL }, **y_result = y_result_;
SDL_bool intersection = SDL_FALSE;
double b, m, left, right, bottom, top;
int xl, xh, yl, yh;
/* solve mx+b line formula */
 m = (double)(y1y2) / (double)(x1x2);
+ m = (double) (y1  y2) / (double) (x1  x2);
b = y2  m * (double) x2;
/* find some linear intersections */
@@ 232,8 +231,8 @@
x_result++;
y_result++;
intersection = SDL_TRUE;
 } else /* it was determined earlier that *both* endpoints are not contained */

+ } else
+ /* it was determined earlier that *both* endpoints are not contained */
if (RISING(rectx1, x2, rectx2) && RISING(recty1, y2, recty2)) {
**(x_result++) = x2;
**(y_result++) = y2;
@@ 246,21 +245,24 @@
intersection = SDL_TRUE;
}
 if (*x_result == NULL) return intersection;
+ if (*x_result == NULL)
+ return intersection;
if (RISING(recty1, right, recty2) && RISING(xl, rectx2, xh)) {
**(x_result++) = rectx2;
**(y_result++) = (int) right;
intersection = SDL_TRUE;
}
 if (*x_result == NULL) return intersection;
+ if (*x_result == NULL)
+ return intersection;
if (RISING(rectx1, top, rectx2) && RISING(yl, recty1, yh)) {
**(x_result++) = (int) top;
**(y_result++) = recty1;
intersection = SDL_TRUE;
}
 if (*x_result == NULL) return intersection;
+ if (*x_result == NULL)
+ return intersection;
if (RISING(rectx1, bottom, rectx2) && RISING(yl, recty2, yh)) {
**(x_result++) = (int) bottom;
**(y_result++) = recty2;